USPS Critical Mail, Important Document Delivery with Critical Mail - Stamps.com

Mail and Ship

Send MailPrint postage online, get discounts, and simplify mailing in one platform.

Print Unlimited Stamps

Print unlimited postage from your computer—no Post Office® trips required.

Track Deliveries

Check delivery status, access proof of delivery, and manage tracking in one place.

Get Discounted Postage

Always get the best deal with discounts on postage and free supplies.

First-Class Mail®

Get trusted, everyday delivery with tracking options and the lowest rates.

Customize Envelopes

Put your business front and center on every envelope with unique customization options.

Certified Mail®

Add proof of mailing and delivery for critical documents.

Verify Addresses

Validate recipient addresses automatically to ensure accuracy every time.

Registered Mail®

Protect high-value items with chain-of-custody handling and added security.

Schedule Pickups

Request USPS pickups that fit your schedule, without ever leaving your desk.

Explore More Mail Classes

Easily compare services to find the ideal speed and price for every envelope.

USPS® Postage Rate Discounts

See today’s discounted USPS rates at a glance. Compare options, estimate costs, and avoid surprises at checkout.

Ship Packages

Get discounted rates, print labels, and track shipments across multiple carriers.

Print Unlimited Shipping Labels

Print unlimited labels with built-in discounts—batch, stick, and ship in minutes.

Ship Internationally

Go global with simplified compliance, customs forms, harmonized codes, and deep discounts.

Access Deep Shipping Discounts

Save on every shipment with the world's most popular carriers.

Schedule Pickups

Avoid complexity and schedule pickups with multiple carriers in a single platform.

Get Free Shipping Supplies

Save time and money on fulfillment with free USPS shipping supplies delivered to you.

Track Packages

Get real-time tracking, full scan history, and faster issue resolution all in one place.

Click-N-Ship®

Create a shipping label in minutes with Click-N-Ship and skip the Post Office line.

Customize Labels

Elevate your brand presence with custom shipping label options.

Verify Addresses

Validate addresses automatically to avoid surcharges and deliver accurately the first time.

More Shipping Services

Explore more domestic and international shipping services, all managed in one place.

Business Solutions

Explore mailing and shipping solutions built for businesses.

Unlimited Postage and Labels

Eliminate downtime with unlimited stamp and label printing—no meter limits, no interruptions.

Schedule Pickups

Coordinate pickups for packages and mail, saving time and keeping deliveries on schedule.

Multi-Location Management

Centralize shipping across offices with shared settings, user controls, and reporting.

Reporting and Analytics

Monitor shipping spend, service usage, delivery performance, and user activity.

Centralized Tracking

View shipment status across carriers, share tracking links, and resolve issues quickly.

Best-In-Class Customer Support

Get expert help via phone, chat, and email to troubleshoot issues and optimize workflows.

Contact Management

Store and manage frequent recipients and keep customer data accurate across teams.

Rate Advisor

Choose the right service for each package with precise rate comparisons.

Address Verification

Validate addresses before printing to prevent undeliverable mail and reduce carrier fees.

Customize Envelopes and Labels

Professionalize every send with branded envelopes and labels.

Industries

Built for businesses that depend on reliable mail and shipping.

Customer Stories

See how customers of all sizes save time and money with Stamps.com.

Supplies Store

Order labels, scales, and printers that integrate seamlessly, keeping your mailing operation efficient and consistent.

Get Free Mailing and Shipping Supplies

Visit the new and improved one-stop shop for mailing and shipping supplies like NetStamps, envelopes, boxes, bubble mailers, scales, thermal printers, and more! Print postage without going to the post office with Stamps.com.

Compare Rates & Plans

Compare carriers, rates, and services with exclusive discounts.

Rate Calculator

Get real-time quotes on shipments using our interactive calculator.

Compare Postage Rates

Pay less for postage with carrier discounts by mail size, weight, and more.